James Rupert Miller (June 27, 1869 – August 23, 1946) was an architect active in San Francisco, California in the first half of the 20th century. Miller gained prominence after the 1906 San Francisco earthquake when his firm was one among many called upon to rebuild the stricken city. Miller and Colmesnil hired teenaged Timothy L. Pflueger in 1907 to help as a draftsman in the office. Miller saw promise in Pflueger and gave him his first assignment: Our Lady of the Wayside Church in 1912. Colmesnil left the partnership in 1913.